Percentage of total calculation

Hi there,

I'm filtering the requests by request_length in order to get specific categories (request_length between 0 and 3mb etc). The next step is to calculate how much of the total (in percentage) that specific category represents: e.g. 0-3mb requests are this much % from the total of requests.
However, after further searches and applying pie charts I'm not successful in viewing this.
I'm applying this to a dashboard.
Can you confirm if this can be done and how?
Thank you!

How about a pie/donat chart with custom ranges? Maybe supplying a sample document helps for other to udnerstand what you are after. The same goes for an example search request, and what kind of data you are expecting that is not returned.

Thanks!